JP2003116314A - Mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mower easily travelable even on a slope or the like. SOLUTION: This mower has the following structure: an engine 9 for driving a traveling hydraulic stepless variable-speed gear for driving left and right traveling units 1 supporting the machine body 2 and a reaping hydraulic stepless variable-speed gear for driving a mowing device 3 provided in the front or rear of the machine body 1 is longitudinally arranged at the center of the machine body 2, a counter gear case 11 is arranged in front of the engine 9, and a traveling hydraulic pump 16 constituting the traveling hydraulic stepless variable-speed gear and a reaping hydraulic pump 14 constituting the reaping hydraulic stepless variable-speed gear are arranged at one side, left or right side, of the counter gear case 11 and at the other side, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing machine in which a mowing device and a traveling device are driven by individual hydraulic continuously variable transmissions.

[0002]

2. Description of the Related Art Conventionally, a traveling hydraulic continuously variable transmission (traveling) is provided in which a reaping device for mowing is provided in front of or behind a machine body supported by left and right traveling devices and which drives the traveling device. HST) and a belt transmission device for driving the reaping device are provided, and a mowing machine in which both drive devices are operated by an engine is known.

However, in the case of the above mower, the engine and HS
It is necessary to dispose the T hydraulic pump on the side of the machine body, and the engine is usually arranged offset in the left-right direction. As a result, the left-right balance of the airframe was poor, which adversely affected the running performance. Therefore, it has been desired to provide a mower that can easily travel even on a sloped land.

[0004]

In order to solve the above-mentioned problems, a mowing machine of the present invention is provided with a mowing device 3 for mowing, which is provided in front of or behind a machine body 2 supported by left and right traveling devices 1. In the grass mower in which a traveling hydraulic continuously variable transmission that drives 1 and a cutting hydraulic continuously variable transmission that drives the mowing device 3 are provided, and both hydraulic continuously variable transmissions are driven by the engine 9, the engine 9 is located at the center of the body 2. And the counter gear case 11 is arranged in front of the engine 9, and the front of the counter gear case 11 forms an output take-out portion 13 protruding in the left-right direction. The first feature is that the traveling hydraulic pump 16 forming the hydraulic continuously variable transmission and the cutting hydraulic pump 14 forming the cutting hydraulic continuously variable transmission are arranged on the other side.

In addition, a radiator 161 is arranged in a space behind the engine 9, an air introduction portion for the radiator 161 is provided behind the radiator 161, and the introduction portion is opened rearward. It has a feature.

A plurality of air filters 164 and 167 are provided in the front and rear on the introduction portion side, and the air filters 164 and 16 are provided.
The third feature is that 7 is attached so that it can be pulled out in the left-right direction.

Further, a fourth characteristic is that an oil cooler 186 for cooling the oil for at least the two hydraulic continuously variable transmissions is arranged in the introduction portion, and the oil cooler 186 is cooled by air to the radiator 161. .

In addition, the oil cooler 186 is provided on the introduction side,
A fifth feature is that the hydraulic pipe 190 is detachably attached in the vertical direction, and the pipe of the hydraulic pipe 190 to the oil cooler 186 is detachable above the oil cooler 186.

[0009]

1, 2 and 3 are a side view, a plan view and a rear view of a mower according to the present invention, and FIGS. 4 and 5 are a side perspective view and a plan perspective view. Is provided with a machine body 2 supported by the left and right crawler type traveling devices 1, a working machine (mowing device) 3 for mowing is supported in the front of the machine body 2 so as to be vertically movable, and further in the rear of the machine body 2. The control unit 4 is provided and configured.

An engine room 6 is formed in front of the control section 4 of the machine body 2, and the engine room 6 is covered with a bonnet 7. The machine frame 8 is located in the bonnet 7 substantially in the center of the machine body 2 in the left-right direction. The engine 9 is mounted on the side.

A counter gear case 11 is attached to the front of the engine 9 on the side of the body frame 8, and an input shaft of the gear case 11 and a drive shaft of the engine 9 are connected via a joint 12. The driving force is input from the engine 9 to the gear case 11.

At this time, the gear case 11 has an input shaft in the center and projects in the left-right direction, so that the driving force can be taken out from both left and right ends. And on the right side is a hydraulic continuously variable transmission for driving the mowing device (mowing HS
The hydraulic pump (cutting hydraulic pump) 14 that constitutes T) is
A hydraulic pump (traveling hydraulic pump) 16 that constitutes a left and right hydraulic continuously variable transmission (traveling HST) for driving the left and right traveling devices 1 is attached to the left side, and both hydraulic pumps 14 and 16 are driven by an output from a gear case. It is configured to be.

That is, the lawn mower is constructed so that the traveling device 1 and the reaping device 3 are operated via the HST using the engine 9 as a driving source, and the left and right traveling devices 1 are driven by the left and right traveling HSTs. The harvesting device 3 is driven by the harvesting HST.

The harvesting HST and the left and right traveling HSTs
Has a structure in which a hydraulic pump and a hydraulic motor that are separately arranged are piped by a hydraulic hose.
The hydraulic motor (cutting hydraulic motor) 20 of ST is the cutting device 3
On the side, hydraulic motors (travel hydraulic motors) 25 for the left and right traveling HSTs are attached to the respective left and right traveling devices 1, and are respectively connected to the harvesting pump 14 or the traveling pump 16 by piping.

The harvesting device 3 is driven by the rotation of the harvesting hydraulic motor 20, and the left and right traveling devices 1 are driven by the rotation of the corresponding traveling hydraulic motors 25, respectively. The left and right traveling hydraulic pumps 16 are integrally packaged.

On the operation panel (operation panel) 17 provided in the above-mentioned control section 4, there is provided an operation lever (steering lever) 18 for traveling so as to be swingable left and right and forward and backward as shown in FIG. The steering lever 18 is provided to operate the left and right traveling HSTs to operate the forward and backward movements and turns of the machine body 2. That is, left and right traveling HS
The mechanism that operates T independently becomes the traveling mechanism of the mower.

The operation panel 17 has a cutting HST.
Mowing switches 10F and 10R for driving the (mowing hydraulic motor 20) to rotate in the forward direction or the reverse direction are provided. By pushing the cutting switch 10F on the forward side, the cutting hydraulic motor 2
0 is driven in the forward rotation direction to positively rotate a claw described later of the harvesting device 3 to perform the harvesting work, and the harvesting hydraulic motor 20 is driven in the reverse rotation direction by pressing the reverse rotation side harvesting switch 10R. The claw can be rotated in the reverse direction to perform the mowing work.

In addition, the operation panel 17 has a mowing device 3
A cutting height lower limit setting lever 19 for setting the lower limit height of the engine and an engine control lever 21 for adjusting the rotation speed of the engine 9 are also provided, and the cutting device 3 is further raised to a height at which the machine body 2 can be turned. A raising switch 18a for
A lowering switch 18b for lowering the cutting height lower limit setting lever 19 to the lower limit height is provided on the grip of the steering lever 18.

In addition to the operation panel 17, the control section 4 is provided with a standing step 22 and a grip section 23. Further, on the left and right sides of the engine 9, an oil tank 3 for a hydraulic mechanism including a fuel tank 30 and an HST is provided.
5 and 5 are allocated and arranged.

This mower is constructed as described above,
At a mowing work place such as a riverbed, a ski resort, or a weed in the vicinity of an interchange, the operator stands on step 22 and uses the lowering switch 18b to set the lower limit lever for cutting height 1
The mowing device 3 is lowered to the height set by 9, and the mowing device 3 is operated by pushing the mowing switch 10F or 10R, and the steering lever 18 is used to move the machine body 2 forward and backward and left and right to move the mowing work place. Mowing work can be performed. The steering structure by the steering lever 18 and the elevating mechanism of the mowing device 3 will be described later.

At this time, as described above, the engine 9 and the counter gear case 11 are placed in the center of the machine body 2, and the cutting hydraulic pump 1
4 and the traveling hydraulic pump 16, and the fuel tank 30 and the oil tank 35 are distributed to the left and right, the lateral and longitudinal balance of the body is excellent, the traveling performance is high, and the vehicle stably travels even on a sloping ground. be able to.

Further, since the relatively large parts as described above are arranged on the machine body frame 8 in a well-balanced manner, the space inside the machine body 2 is effectively utilized, and particularly a relatively large space is provided behind the engine 9. As described later, the engine 9 and components of the HST (oil for HST) cooling system and the like can be easily arranged in the space, and maintenance can be easily performed.

On the other hand, in the mowing device 3 of this embodiment, a claw shaft (more shaft) 26 is rotatably supported by the mowing frame 24.
It has a structure in which a plurality of claws 27 for mowing are attached, and the mower shaft 26 is rotated to rotate the claws 27 to mow the grass.

At this time, as shown in FIG. 7, the mower shaft 2
A plurality of mower mounting brackets 29 made up of two plates 28 facing each other are attached to the peripheral surface of the mower 6, and two claws 2 are provided in opposite directions between the plates 28 of the mower mounting bracket 29.
7 is inserted, and the claw 27 is rotatably supported by the mower mounting bracket 29 via the pin 31.

A torsion spring 33 is externally fitted and attached to a pin 32 which is provided below the pin 31 and regulates the rotation of the claw 27, and one end of the torsion spring 33 is attached to the pin 31. The other end is locked to the mower mounting member 29, and the torsion spring 33 prevents the pin from coming off.

The claw 27 is supported by the mower shaft 26 as described above, and is rotationally driven by the rotation of the mower shaft 26 while being rotatable about the pin 31 to mow the grass. At this time, when the claw 27 comes into contact with a stone or the like, the claw 27 rotates around the pin 31 and escapes, so that the claw 27 is prevented from being damaged. The claw 27
Can be easily attached and detached by releasing the engagement of the torsion spring 33 with the pin 31. Also, both pins 31,
The end of 32 may be provided with a retainer such as a C ring or a pin.

On the other hand, the traveling apparatus 1 has an idler 34, an equalizer type movable wheel 36, and a driving sprocket 37.
The crawler 39 is wound around the upper roller 38, and the crawler 39 is rotated by rotating the sprocket 37. A crawler guide 41 for preventing the crawler from coming off is provided on the movable wheel 36 side, and the crawler guide 41 is provided.
Swings together with the movable roller 36 to prevent the crawler 39 from coming off.

The left and right traveling hydraulic motors 25 are
The sprocket 37 of the traveling device 1 is directly attached to the left and right traveling devices 1 and is piped to a traveling hydraulic pump 16 corresponding to each traveling hydraulic motor 25.

Next, the lifting structure of the reaping device 3 will be described. As shown in FIGS. 4 and 8, the body frame 8
A lower link 42 and a top link 43 are rotatably supported below and below the front part of the vehicle so as to be vertically movable.
A lift arm 44 is pivotally supported between and. A hydraulic cylinder 45 is provided between the arm 46 that rotates integrally with the lift arm 44 and the body frame 8 side.

At this time, the lift arm 44 and the lower link 4
2 is connected by a connecting arm 47, and the lift arm 44 is swung up and down via the arm 46 by the expansion and contraction of the hydraulic cylinder 45.
When the lower link 4
2 can be raised and lowered.

A lift frame 48 for supporting the harvesting device 3 via the harvesting frame 24 is supported by the lower link 42 and the top link 43, and the hydraulic cylinder 45 is expanded and contracted by the above-described structure, as shown in FIG.
The harvesting device 3 is moved up and down with respect to the machine body 2 as shown in FIG.

The above-mentioned cutting height lower limit setting lever 19 is provided so as to be swingable back and forth, and the height of a sensor (not shown) for detecting the height of the cutting device 3 by coming into contact with the descending cutting device 3. Is configured so that it can be changed. When the lowering switch 18b is turned on, the hydraulic valve of the hydraulic cylinder 45 is operated to the lowering side,
After that, the sensor detects the reaping device 3 to stop the operation of the hydraulic valve on the descending side, so that the reaping device 3 is lowered to a predetermined height.

By turning on the raising switch 18a, the valve of the hydraulic cylinder 45 can be operated to the raising side to raise the mowing device 3 to any height of the operator. By controlling the valve of the hydraulic cylinder 45 as described above, the expansion and contraction of the hydraulic cylinder 45 can be controlled to adjust the height of the mowing device 3.

On the other hand, the lift frame 48 is, as shown in FIGS. 9 and 10, the cutting frame 24 of the cutting device 3.
A support box 49 is provided on the upper side and a support tool 51 is provided on the lower side to support the. In the support box 49, a plurality of pairs of rotating bodies (rollers) 52 facing each other vertically are provided in the left and right directions, and a horizontal slide rod (slide rod) integrally attached to the mowing frame 24 is installed in the support box 49. ) 53 is sandwiched and supported by upper and lower rollers 52 so as to be slidable left and right.

The support 51 has a shaft 51b protruding from above a main body 51a having a substantially L shape in a side view, and a bearing 51c so as to rotate in a plane direction on the shaft 51b.
Is provided on both left and right sides of the lift frame 48. A horizontal support rail 54 is integrally attached to the cutting frame 24 at a position below the slide rod 53, and the bearing 51c is provided on the upper and lower surfaces of the support rail 54 so as to extend in the horizontal direction. The support tool 51 supports the support rail 54 so as to be slidable left and right by housing the support rail 54 in the opening 54a.

The support box 49 is provided with a receiving member 57 for accommodating the cutting frame 24 by screwing the screws 56 provided in the left and right directions. At this time, the screw 56 is rotationally driven by a motor 58 provided on the side of the mowing frame 24, that is, the rotational driving of the screw 56 causes the mowing frame 24 to slide laterally.

As described above, the reaping device 3 is moved to the side of the machine body 2 by a slide mechanism including a support box 49 and a support tool 51 on the lift frame 48 side, and a slide rod 53 and a support rail 54 on the reaping frame 24 side. It is supported so as to be slidable right and left, and the position of the left and right is adjusted by driving the motor 58.

The operation panel 17 is provided with a slide switch 15 for operating the motor 58 in the left-right direction to normally or reversely rotate the motor 58 and slide the reaping device 3 left and right. Therefore, when the slide switch 15 is tilted leftward or rightward, as shown in FIGS.
As shown in FIG. 2, the end portion of the mowing device 3 can be largely projected to the left or right outside of the machine body 2, and the mowing work possible range for the machine body 2 can be largely offset in the left-right direction.

Thus, when performing the mowing work in the mowing work range (wrinkle), it is not necessary to move the machine body 2 in the mowing work range (wrinkle) by offsetting the mowing device 3 to the left or right. , It is possible to run the machine body 2 relatively inside the working range to perform (reaping) mowing work in the grass cutting working range, and even if the working range has a possibility of derailing, The mowing work can be easily performed by the mowing machine, and the work efficiency of the mowing work can be improved.

The above-mentioned mowing hydraulic motor 20 is provided on the mowing frame 24. By connecting the drive shaft of the mowing hydraulic motor 20 and the mower shaft 26 via the pulley 59 and the belt 61, the mowing hydraulic motor 20 is cut. A drive force is transmitted from the hydraulic motor 20 to the mower shaft 26 to drive the harvesting device 3 (claw 27).

At this time, a relay block 62 for relaying the piping hose is arranged on the lift frame 48, and piping between the mowing pump 14 and the mowing hydraulic motor 20 is performed from the mowing pump 14 to the relay block 62. Piping with the first hose 63 and the relay block 62
It has a divided structure from the cutting hydraulic motor 20 to the cutting hydraulic motor 20 by piping with the second hose 64.

The harvesting pump 14 and the relay block 62
The piping between the first hose 63 and the first hose 63 is curved in a U-shape with a relatively large diameter that allows the lift frame 48 to move up and down, and between the relay block 62 and the cutting hydraulic motor 20. Piping is the second hose 64
Is curved in a U-shape with a relatively large diameter that allows the cutting frame 24 to slide left and right.

At this time, the relay block 6 of the second hose 64
2 side is swivel joint 66 which is a swivel joint of piping
Are connected via. As a result, the up / down movement of the mowing device 3 is allowed by the piping by the first hose 63, and the left / right slide is allowed by the second hose 64. Therefore, the left / right slide of the mowing device 3 can be performed without using a hose longer than necessary. In addition, piping (piping) without obstructing vertical movement can be performed.

Further, the second hose 64 is connected to the relay block 62.
By being connected via the swivel joint 66 on the side, the rotation of the swivel joint 66 absorbs the twist of the hose 64 when the harvesting device 3 slides left and right, and the piping does not hinder the sliding left and right. Left and right slides are done smoothly.

On the other hand, as shown in FIG. 13, a horizontal frame 71 in the left-right direction is provided on the rear end side of the machine body frame 8, and a vertical frame 72 extends upward from the end of the horizontal frame 71. It is projected. Also, the vertical frame 7
A support frame 73 in the left-right direction is provided on the body 2 so as to protrude toward the inside of the machine body 2.

Then, as shown in FIGS. 13 and 14,
A bearing holder 74 is attached to the support frame 73, and a support shaft 77 is rotatably protruded rearward from the bearing holder 74 via a bearing 76 incorporated therein. A vertical steering vertical frame 79, which constitutes a frame (steering frame) 78 of the steering section 4, is attached to the support shaft 77.
As a result, the control vertical frame 79 is rotatably supported on the machine body frame 8 about the support shaft 77.

The control frame 78 includes, in addition to the control vertical frame 79 described above, horizontal control horizontal frames 81 and 82 attached to the upper and lower ends of the control vertical frame 79. The above-mentioned operation panel 17 and the grip portion 23 are provided on the lateral frame (upper steering lateral frame) 81.
Each step 22 is attached to the lower control lateral frame (lower control lateral frame) 82 and is covered with a cover 85.

That is, the control section 4 is constructed on the basis of the control frame 78 as described above, and the control vertical frame 79 is pivotally supported on the body frame 8 side so that the control section 4 itself can be rotated. It is rotatably supported on the body frame 8 side. A hydraulic cylinder 83 is provided between the vertical frame 72 of the machine body frame 8 and the vertical steering frame 79 of the steering frame 78, as shown in FIGS.
As shown in FIG. 3, the control section 4 can be driven to swing left and right with respect to the machine body 2 by expanding and contracting the hydraulic cylinder 83.

At this time, the potentiometer 84 is attached to the support frame 73, and the rotary shaft of the potentiometer 84 and the control vertical frame 79 are connected via the link 86, whereby the control vertical frame 79 is provided.
It is possible to measure the swing angle of the (control section 4) with the potentiometer 84. Further, a tilt sensor 87 is attached to the lateral frame 71 of the machine frame 8 to measure the angle of the machine frame 8, that is, the angle of the ground on which the grass mower is grounded.

The outputs of the potentiometer 84 and the inclination sensor 87 are input to a microcomputer unit (not shown) that controls the operation of the hydraulic cylinder 83, and the horizontal automatic control function provided in the microcomputer unit causes the horizontal automatic control function. The microcomputer unit has both sensors 84 and 87.
Based on the information from (1), the control unit 4 is configured to extend and contract the hydraulic cylinder 83, which is an adjusting device, so that the control unit 4 maintains the horizontal position (both the control lateral frames 81 and 82 maintain the horizontal position).

As a result, as shown in FIG. 16, since the control section 4 is kept horizontal during work on the slope E, the operating angles of the grip section 23 and the steering lever 18 attached to the control frame 78 are horizontal. It does not change compared to when working on the ground, and the angle of step 22 is also kept horizontal, allowing the operator to operate while standing on a substantially vertical plane when working on sloping ground. With the same workability, the mower can be operated and the mowing work can be easily performed.

At this time, the body 2 located in front of the control section 4
Since the vehicle inclines along the sloping ground E, the vehicle body 2 does not hinder the operator's forward field of view even on the sloping ground E, the valley-side visibility on the sloping ground E is not deteriorated, and the valley-side visibility on the sloping ground is improved. Therefore, it is possible to prevent uncut areas and the like.

The operation panel 17 is provided with a horizontal automatic switch 88 for operating ON / OFF of the horizontal automatic control function, and an operator can operate ON / OFF of the horizontal automatic function by the horizontal automatic switch 88. . This makes it possible to improve maintainability by turning off the horizontal automatic function during maintenance.

Further, in the above-mentioned step 22, the rear guard 89 for guarding the operator from the rear is detachably provided, and the rear guard 89 is rotatably supported by the lower steering lateral frame 82 through the pin 91, and is indicated by a virtual line in FIG. The posture can be freely switched between the standing storage posture A shown and the use posture B projecting rearward.

As a result, the rear guard 89 is moved to step 22.
By removing the mower from step S22 and switching the step 22 to the accommodation posture A, it is possible to shorten the entire length of the mower and easily perform transportation and the like. Note that the stopper pin 9 is attached to the step 22.
2 is provided, and the stopper pin 92 can maintain the accommodation posture A.

Further, a rubber stopper 93 is attached to the front side of the step 22, and the step 22 is used by tilting the step 22 and bringing the stopper 93 into contact with the rear surface of the lower steering lateral frame 82. It can be positioned in posture B. At this time, the stopper 93 is interposed between the step 22 and the side of the control section frame 78 to perform positioning of the step 22 and vibration isolation.

Next, the steering structure of the traveling device 1 (traveling HST) by the steering lever 18 will be described in detail.
As shown in FIGS. 13, 17, 18A, and 18B, the upper steering lateral frame 81 includes a lever bracket 94.
Are fixed by bolts 96, and the lever bracket 94 is attached with a front-back rotation fulcrum shaft 97 in the left-right direction by bolts 98.

A support shaft 9 for rotatably swinging the steering lever 18 left and right is provided substantially at the center of the left and right of the front and rear fulcrum shaft 97.
A boss 102 of a supporting member 101 having a rearward projecting portion 9 is rotatably fitted on the boss 102. Further, to the left and right of the boss 102 of the support tool 101 on the front-back rotation fulcrum shaft 97, the boss 104 of the left operation tool 103 for operating the travel pump (left travel pump) 16L of the left travel HST, and the right travel H.
The boss 107 of the right operation tool 106 that operates the ST travel pump (right travel pump) 16R is rotatably fitted on the outside.

At this time, arms 108 and 109 for operating the traveling pumps 16L and 16R are provided on both operation tools 103 and 106.
Is integrally provided on the bosses 104 and 107, as shown in FIG.
4, as shown in FIG. 19, the arm 108 of the left operation tool 103 is the trunnion arm 110 of the left traveling pump 16L.
In addition, the arm 109 of the right operation tool 106 has the right traveling pump 16
On the trunnion arm 111 of R, the left and right operation tools 103,
The trunnion arms 110 and 111 are connected so that the trunnion arms 110 and 111 can be operated by the rotation of the front-rear rotation fulcrum shaft 97 as an axis.

As a result, the trunnion arms 110 and 111 of the left and right traveling pumps 16L and 16R are operated by the rotations of the left and right operation tools 103 and 106, and the output rotation of the left and right traveling hydraulic motors 25 is changed. Traveling device 1
It is possible to change the speed of driving independently. Support tool 1
A washer 112 is provided between the boss 102 of 01 and the bosses 104 and 107 of the left and right operation tools 103 and 106.

The connection between the operation tools 103, 106 and the trunnion arms 110, 111 will be described in more detail. As shown in FIGS. 14, 15, 17, 19, 20, etc., the left and right operation tools 103 will be described. , 106 arms 108, 1
09 and the left and right trunnion arms 110 and 111 include operation wires 113 and 114 connected to the trunnion arms 110 and 111, operation rods 116 and 117 connected to the arms 108 and 109, and an operation wire 11.
3, 114 and operation rods 116, 117 are connected by relay rods 118, 119.

At this time, the relay rods 118, 119
Is a body-side rod 122 supported by a bracket 120 protruding forward from the rear side of the body frame 8 through a ball joint 121 so as to be rotatable in the axial direction, and one end side of which is an axis centered on the control frame 78 side. It is rotatably supported in the direction via a ball joint 123, and the other end side is composed of a control section side rod 126 connected to one end side of the body side rod 122 via a universal joint 124.

An arm 127 is provided at the end of the body side rod 122 opposite to the universal joint 124, and the arm 127 and the trunnion arm 1 are provided.
10 and 111 are connected via the wires 113 and 114. An arm 128 is also attached to the end of the control unit side rod 126 opposite to the universal joint 124.
Is provided, and the arm 128 and the operating tools 103, 1
The arms 108 and 109 of 06 are the operation rods 11 described above.
6, 117 are connected.

The operating tools 103, 106 and the trunnion arms 110, 111 are connected as described above, and when the operating tools 103, 106 are rotated, the arms 108, 10 are rotated.
9 is swung in the up-down direction, and the arm 128 of the control unit side rod 126 is swung up and down by the vertical swing of the arms 108 and 109, and the control unit side rod 126 is rotated in the axial direction.

Then, the rotation of the rod 126 on the control section is transmitted through the universal joint 124 to the rod 1 on the fuselage side.
22. The body side rod 122 is rotated in the axial direction by being transmitted to the body 22, and the arm 127 of the body side rod 122 is swung by the rotation of the body side rod 122, and the wire 1
Trunnion arm 110,111 via 13,114
Is oscillated and the travel HST (travel hydraulic pumps 16L, 1
6R).

The operating tools 103, 106 and the trunnion arms 110, 111 output forward rotations that cause the traveling hydraulic motor 25 to move the machine body 2 forward by swinging the arms 108, 109 downward. The traveling hydraulic motor 25 is set to output the rotation in the reverse direction for moving the machine body 2 backward by swinging 109 upward.

The two relay rods 118 and 119 are arranged in the front-rear direction, and both relay rods 118 and 119 are arranged.
The universal joint 124 is arranged such that the center of the universal joint 124 is located on an extension line of the rotation center of the control frame 78. As a result, even if the control section 4 is swung as described above, the relay rods 118 and 119 are bent via the universal joint 124 along the extension line of the rotation axis of the control frame 78 to swing the control section 4. Tolerate.

As a result, when the control section 4 swings, the swing angles of the trunnion arms 110 and 111 do not change, the traveling speed of the machine body 2 does not change due to the swing of the control section 4, and the arms 108 and 109 move. The operation is stably transmitted to the trunnion arms 110 and 111, and the traveling speed of the machine body 2 can be easily controlled.

A switch arm 132 for turning on and off the brake switch 131 for activating the parking brakes of the left and right traveling hydraulic motors 25 is provided on each of the operation tools 103, 106 when the traveling hydraulic pumps 16L, 16R are in neutral. . As a result, the traveling hydraulic pumps 16L, 1
The parking brake is applied to the traveling hydraulic motor 25 at the time of 6R neutral, and the parking brake is released during the operation of the traveling hydraulic pumps 16L and 16R.

At this time, opening / closing of the parking brake is controlled by the operation of the parking brake valve, and the spring pushes the disc to operate the brake when the parking brake valve is open, and the spring is hydraulically operated by the opening / closing operation of the parking brake valve. It is configured to release the return brake.

The brake switch 131 is normally closed (ON), and the hydraulic pumps 16L, 16R.
When the switch arm 132 turns on the brake switch 131 during neutral, the parking brake valve is released (OFF), the parking brake valve is turned off, and the brake is turned on. The parking brake is configured such that both parking brakes are released when at least one brake switch 131 is released.

On the other hand, a boss 134 is provided at the base end of the steering lever 18, and the boss 134 serves as the support shaft 9.
9 is rotatably fitted on the outer surface. As a result, the steering lever 18 moves to the left and right around the support shaft 99, and the front-back rotation fulcrum shaft 97
It is supported swingably back and forth around.

At this time, the boss 134 is fitted with two engaging plates 136 having engaging claws 136a and 136b protruding diagonally from above and below and a torsion spring 137, and the C-ring 13 is fitted.
It is prevented from being pulled out by 8. Both engaging plates 136 are attached symmetrically, and an upper engaging portion 139 by an upper claw portion 136a of both signal plates 136 is provided on the upper side and a lower side of both signal plates 136 is on the lower side. The lower engaging portion 141 is formed by the claw portion 136b.

The steering lever 1 is attached to the upper engaging portion 139.
The lever pin 142 projected from the 8 side is engaged with the lower engagement portion 141 and the support tool pin 143 projected from the support tool 101 side, and both ends of the torsion spring 137 are different from each other. It is locked to the engagement plate 136.

As a result, when the steering lever 18 is oscillated in the left-right direction, the steering lever 18 is twisted by the engagement between the lever pin 142 and the upper claw portion 136a of one of the engagement plates 136. The steering lever 18 is swung against the urging force of the steering lever. Therefore, the steering lever 18 is returned by the urging force of the torsion spring by releasing the swaying operating force (releasing the steering lever 18 from the hand). Located in a neutral position.

On the other hand, on the base end side of the steering lever 18, there is provided a plate 144 which surrounds the boss 134 in the left-right direction and has a cross section on the gate which is opened downward in a front view. Shaft 1 from both left and right sides
A cam roller 147 is rotatably supported on the end of the shaft 146.

Then, the left and right HST operation tools 103, 10
A plate 149 having a cam hole 148 formed therein is integrally fixed to the bosses 104 and 107 of No. 6, and the cam roller 147 of the left shaft 146 and the right plate 149 are connected to the cam hole 148 of the left plate 149. Cam hole 1
The cam roller 147 of the shaft 146 on the right side is inserted into the shaft 48.

With the above structure, when the steering lever 18 is swung back and forth and a predetermined portion of the edge portion of the cam hole 148 comes into contact with the cam roller 147, the cam roller 147 moves.
By pushing the contact portion of 8, the operation tools 103 and 106 are rotated. As a result, as described above, the trunnion arms 110 and 111 of the left and right traveling hydraulic pumps 16L and 16R are operated to operate the traveling HST, the traveling device 1 is driven, and the machine body 2 is caused to travel.

The cam hole 148 is formed in the vertical direction, and the contact portion with the cam roller 147 changes as the steering lever 18 swings left and right. As a result, as will be described later, a difference is generated in the operation amount of the left and right trunnion arms 110 and 111, and the drive speed of the left and right traveling devices 1 is made to differ, so that the machine body 2 is turned to the left and right. That is, the forward / backward and left / right turning of the machine body 2 can be operated by swinging the steering lever 18 left / right and forward / backward.

At this time, the steering lever 18 side and the operating tool 10
3, 106 side means that both the left and right traveling hydraulic pumps 16L, 1 at the left and right and front and rear neutral positions of the steering lever 18.
6R is connected via a cam roller 147 and a cam hole 148 so that 6R becomes neutral.

Next, the operation tool 103 by the steering lever 18,
The operation of 106 will be specifically described. Cam hole 1 above
At the neutral position of the steering lever 18 in the left-right and front-rear directions, the straight guide portion 15 is in contact with the cam roller 147 via a gap corresponding to the play of the front-back swing of the steering lever 18.
1 is provided in the up-down direction by a predetermined length (a length corresponding to the play of the left-right swing of the steering lever 18).

As a result, when the steering lever 18 is swung back and forth from the neutral position, the forward and backward swing of the steering lever 18 is swung by an angle equal to or greater than the forward and backward play angles. Straight guide 151 and left and right cam rollers 1
47 abuts, the left and right operation tools 103, 106 are rotated by the same angle in proportion to the swing of the steering lever 18, and the arms 108, 1 are rotated according to the rotation angles of the operation tools 103, 106.
09 is swung up and down from the neutral position where the traveling hydraulic pumps 16L and 16R are in neutral.

As a result, the left and right traveling hydraulic pumps 16 are
The L and 16R trunnion arms 110 and 111 swing from the neutral (output 0) in the same direction and at the same angle, and the left and right traveling hydraulic motors 25 output the same rotation in the same direction.
The left and right traveling devices 1 are driven in the same direction at the same speed, and the body 2
Can go straight forward or backward.

On the other hand, in the cam hole 148, the cam lever 1 is swung below the straight guide portion 151 by swinging the steering lever 18 from the neutral position over the left and right play angles.
There is provided a deceleration guide portion 152 that comes into contact with 47, and the deceleration guide portion 152 includes the straight advance guide portion 151 and the cam roller 14
When the steering lever 18 is swung back and forth from the neutral position by a swing angle equal to or greater than the swivel angle at which the swivel lever 7 comes into contact, the steerable lever 18 comes into contact with the cam roller 147.

That is, when the operation tools 103 and 106 are rotated through the deceleration guide section 152, compared with when the operation tools 103 and 106 are rotated through the straight-ahead guide section 151, the steering lever 18 is moved forward and backward. Cam hole 14 when swinging in the direction
8 and the contact of the cam roller 147 are delayed. With the above configuration, when the steering lever 18 is swung to the left or right beyond the left and right play angles, the left or right cam roller 147 comes into contact with the deceleration guide portion 152 of the left or right cam hole 148 to operate the operation tool. 103 and 106 are rotated by an angle smaller than the contact between the linear guide 151 and the cam roller 147.

As a result, as shown in FIG. 21, for example, when the steering lever 18 is swung to the left from the forward straight traveling state (the steering lever 18 is swung forward by a predetermined angle), the left side is reached. The contact between the cam roller 147 and the cam hole 148 is performed in the deceleration guide portion 152, that is, the left operation tool 103 returns to the neutral side by the return spring of the trunnion arm 110 of the left traveling hydraulic pump 16L and the traveling resistance. The rotation angle from the neutral position of the left operation tool 103 becomes equal to or smaller than the rotation angle of the right operation tool 106, and the output rotation of the left traveling hydraulic motor 25 becomes the output rotation of the right traveling hydraulic motor 25. Since the traveling apparatus 1 on the left side becomes smaller, the traveling speed of the traveling apparatus 1 on the left side becomes lower than that of the traveling apparatus 1 on the right side, and the machine body 2 turns to the left.

The deceleration guide portion 152 has a stop portion 152b formed in front of the straight-travel guide portion 151 and substantially parallel to the straight-travel guide portion 151, and the stop portion 152b and the straight-travel guide portion 15.
And a stop portion 152b.
And the cam roller 147 are brought into contact with each other, the operation tools 103, 106
Is set so as not to rotate (position to the neutral position).

That is, the inclined portion 152a and the cam roller 14
7, when the contact portion with the cam roller 147 approaches the stop portion 152b, the turning angles of the operation tools 103 and 106 approach neutral, and the output of the traveling hydraulic motor 25 gradually decreases, causing the stop portion to stop. When 152b and the cam roller 147 come into contact with each other, the operation tools 103 and 106 return to the neutral position, and the output of the traveling hydraulic motor 25 becomes zero.

Therefore, the cam roller 147 and the inclined portion 152
In the range where a and a contact with each other, the driving speed of the traveling device 1 on the inside of the turn decreases in proportion to the swinging angle of the steering lever 18 in the left-right direction, and the turning radius of the machine body 2 gradually decreases. The left / right swing angle of the directional lever 18 is determined by the cam roller 147.
When it is in a range where the stop portion 152b and the stop portion 152b come into contact with each other, the traveling device 1 on the inside of the turn stops, and the machine body 2 turns to the ground. That is, FIG. 21 shows a swinging state of the steering lever 18 at the time of turning the ground.

Further, the deceleration guide portion 152 is provided in the cam hole 148.
When the steering lever 18 is swung to the left or right from the neutral position in the front-rear direction by a predetermined angle or more continuously to the lower end of the steering wheel, the steering lever 18 comes into contact with the cam roller 147, and the steering lever 18 is further swung, whereby Operation tool 103 for swinging direction 18
Or 106 in proportion to the swing angle of the steering lever 18,
A reverse rotation guide portion 153 for rotating the arm 108 or 109 so as to swing upward is provided.

The straight guide portion 15 is provided in the cam hole 148.
When the steering lever 18 is continuously swung to the left or right from the neutral position in the front-rear direction by a predetermined angle or more continuously to the upper end of 1, the cam roller 147 is contacted, and the steering lever 18 is further swung to steer the steering wheel. A forward rotation guide portion for rotating the operating tool 106 or 103 on the opposite side of the swinging direction of the lever 18 so that the operating arm 108 or 109 swings downward in proportion to the swinging angle of the steering lever 18. 154 is provided.

The reverse rotation guide portion 153 and the forward rotation guide portion 1 are provided.
The reference numeral 54 indicates contact between the cam roller 147 and the reverse rotation guide portion 153 in the swing direction and contact between the cam roller 147 and the forward rotation guide portion 154 on the opposite side in the swing direction when the steering lever 18 swings. At the same time, in proportion to the swing angle of the steering lever 18, the operation tool 103 or 106 on the swing direction side and the operation tool 106 or 103 on the opposite side of the swing direction have opposite directions and absolute values. The angle and length are set so as to rotate the same angle.

As a result, as shown in FIG. 22, when the steering lever 18 is swung to the left from the neutral state in the front-rear direction by a predetermined angle (the angle at which the left cam roller 147 and the reverse rotation guide portion 153 contact), The traveling device 1 on the left side is driven in the reverse direction, the traveling device 1 on the right side is driven in the forward direction at the same speed as the traveling device 1 on the left side, and the machine body 2 makes a super turning turn.

The steering lever 18 is projected through a guide hole 156a of a lever guide 156 as shown in FIG. 23, and the front and rear and left and right swing ranges of the steering lever 18 are controlled by the lever guide 156. It is regulated. Then, the lever guide 156 can perform the above-described super-spinning turning operation only by swinging left and right from the neutral position in the front-rear direction, and the range of swinging left and right becomes smaller as the forward speed increases. The turning radius in which turning is possible is set to gradually increase.

With the structure shown above, the operator can swing the single steering lever 18 back and forth and left and right to operate the forward and backward and left and right turns of the machine body, and the operability of the machine body is high. The driving and steering can be easily operated. In particular, since the turning radius is proportional to the right and left swing angles of the steering lever 18, the turning operation can be easily performed with a natural operation feeling.

At this time, the front / rear or left / right swing of the steering lever 18 is transmitted to the trunnion arms 110, 110 by the cam mechanism composed of the left and right independent cam holes 148, the cam rollers 147, etc., as described above. Since the number of parts of the operation mechanism for transmitting the operation of 18 is small and the assembly error is small, the swinging operation of the steering lever 18 can be transmitted more accurately. Further, due to the small number of parts and the small number of adjustment points, there are few failures, and a stable operation mechanism can be constructed.

In particular, the turning radius becomes larger as the traveling speed becomes higher, and the super-spot turning can be performed only when the machine body 2 is stopped (at the traveling speed 0). It is possible to prevent a ground turn and a super turning turn, and to easily perform a turning operation.

In addition, since the traveling device on the outside of the turn at the time of turning has the same speed as when traveling straight ahead due to the above structure, the load on the engine 9 side at the time of turning can be prevented from increasing and the engine stall during turning can be prevented. At the same time, since the turning speed does not change as compared with the case of going straight, turning can be performed smoothly.

Next, the cooling system and the intake system of the engine 9 and the oil cooling system of the hydraulic circuit will be described. Figure 2
As shown in FIG. 4 and FIG. 25, in the space behind the engine 9, a radiator 161 is provided which is attached to the body frame 8 side, and an air duct 162 is provided behind the radiator 161.

At this time, the air duct 162 is opened rearward, and air is taken into the air duct 162 through the opening (intake window) 163 to cool the radiator 161 and the like. As shown in FIGS. 26 to 28, a wire mesh air filter 164 is attached to the intake window 163, and the air filter 16 is further attached.
A cover 166 is provided on the outer side of the No. 4 on the air duct 162 side, and a wire mesh-like air filter 167 is also attached to the cover 166.

That is, the air duct 162 and the cover 166.
The air introducing portion to the radiator 161 is constituted by the air duct 162, and the air filters 164 and 1 are provided in the air duct 162.
Air is taken in via 67. Then cover 1
The air filter 167 of 66 is attached to the cover 166 so that it can be attached and detached by sliding laterally. Further, a removal hole 168 for removing the air filter 164 is formed on the side of the cover 166, and both air filters 164 and 167 can be removed in the same direction.

The air filter 164 has a bent portion 1 on the end face.
The wire mesh is attached to the frame provided with 69, and when the air filter 164 is inserted into the removal hole 168 of the cover 166, the bent portion 1 of the air filter 164.
Covered by 69. The air filter 164 and the air filter 167 are attached to the side surface of the cover 166 by the knob bolt 171 and the knob bolt 172.

With the structure shown above, the air filters 164, 167 can be easily attached and detached, and the air filters 164, 167 can be easily cleaned and replaced. Moreover, since the radiator 161, the air duct 162, the air filters 164, 167, etc. are arranged in a relatively large space formed behind the engine 9 as described above, maintenance work such as replacement is easy.

In particular, since a plurality of (two) air filters are arranged at the front and rear, air having a high filter effect and little dust can be supplied to the engine 9 side, and also the engine 9 side can be protected. . The air filter 16
Since the 4, 167 can be easily pulled out to the side as described above, the maintainability of the air filters 164, 167 is high.

A dust pot 173 having a predetermined space is formed in the lower portion of the cover 166, and the state inside the dust pot 173 can be confirmed through a transparent inspection window 174 provided on the back surface of the cover 166. When the dust is accumulated, the dust and the like can be discharged through the bottom plate 178 of the cover 166 which is openably and closably attached by the hinge 176 and the trunk metal fitting 177.

As shown in FIGS. 2, 4 and 26, the bonnet 7 is also provided with an intake port 179,
A wire-mesh-like air filter 181 close to the intake port 179.
It is also possible to take in air to the radiator 161 side via the. The air inlet 182 of the air filter 181
The front of the radiator 161 is partitioned by the partition plate 183 from the engine 9 and the muffler 184, and is configured to prevent dust and to block the heat of the muffler 184 and the engine 9.

On the other hand, in the air duct 162 described above, an oil cooler 186 for cooling the oil (pressure oil) in the hydraulic circuit of the mower is provided, and the air taken into the radiator 161 cools the oil. Is going.
At this time, the oil cooler 186 is
6 the pin 187 protruding to the bottom side of the air duct 162
The bottom surface side is supported by being inserted into the bracket 188 on the bottom surface side.

The upper side of the oil cooler 186 is fixed to the stay 195 above the air duct 162 via a nut 189. The piping between the hydraulic pipe 190 and the oil cooler 186 is configured such that the hydraulic pipe 190 is routed from the lower side into the air duct 162, is connected at the upper side of the oil cooler 186, and is divided by the joint 192 at the uppermost part of the piping. Has been done.

Therefore, when removing the oil cooler 186, the air filters 164 and 167 are pulled out, the air filter 181 is removed, and the bolt 19 of the joint 192 is removed.
3 can be removed, the nut 189 can be removed, and it can be easily pulled up. Thereby, the oil in the hydraulic circuit can be cooled in the cooling system of the radiator 161. It should be noted that the oil cooler 186 can be easily attached and detached as described above and has high maintainability. Also, since the space behind the engine 9 is large as described above, the radiator 161 can be easily maintained.

Finally, the hydraulic circuit of the mower will be briefly described. As shown in FIG. 29, the output of the engine 9 is output to the counter gear case 11, and the output gears 11 a and 11 b of the counter gear case 11 drive the drive shafts 14 a and 16 a of the cutting hydraulic pump 14 and the traveling hydraulic pump 16.
a is rotationally driven. A pump 193 that supplies pressure oil to the hydraulic cylinder 45 and the hydraulic cylinder 83 is provided at the rear end of the cutting hydraulic pump 14.
It is driven integrally with the cutting hydraulic pump 14 by the drive shaft 14a of No. 4.

The cutting hydraulic pump 14 and the cutting hydraulic motor 20 are piped to form a cutting HST, and the traveling hydraulic pumps 16L and 16R and the traveling hydraulic motor 25 are piping to form a left and right traveling HST. is doing. The output from the pump 193 is output to a valve unit 197 integrally provided with a valve 194 for controlling the hydraulic cylinder 45 and a valve 196 for controlling the hydraulic cylinder 83.
Both hydraulic cylinders 45 and 83 are operated by 7.

An oil cooler 186 is arranged in the oil discharge path from the reaping hydraulic pump 14 and the traveling hydraulic pump 16, so that the pressure oil in the hydraulic path is cooled.

[0113]

According to the structure of the present invention configured as described above, the engine and the counter gear case are arranged in the center of the machine body, and the hydraulic pumps of both hydraulic continuously variable transmissions (HST) are arranged on the left and right sides of the machine body. Therefore, in addition to being able to effectively use the space inside the fuselage, the left and right weight balance of the fuselage is improved, the traveling performance can be improved, and the effect of being able to travel stably even on slopes is there.

Further, since the space behind the engine can be made relatively large, it is possible to easily arrange the components of the cooling system of the engine, such as the radiator, in the space, and further to prevent the air from flowing to the radiator. Even if the introduction portion is provided so as to be opened rearward, air can be sufficiently introduced, and the cooling system can be compactly and centrally arranged.

It is also possible to arrange a plurality of air filters at the front and rear. In this case, it is possible to improve the filter effect, supply air with little dust and the like to the engine side, and protect the engine side. You can The space allows the air filter to be easily pulled out in the left-right direction, thus improving the maintainability of the air filter.

Further, by disposing an oil cooler in the above-mentioned introducing portion and cooling the oil by the air introduced into the radiator, the cooling mechanism of the oil can be made simple and space-saving. Install the oil cooler on the inlet side so that it can be inserted and removed in the vertical direction, and the oil pressure pipes to the oil cooler can be attached and removed on the upper side of the oil cooler. This can be easily done by removing the oil cooler on the upper side and pulling the oil cooler upward, and the maintainability on the oil cooler side is also improved.

[Brief description of drawings]

FIG. 1 is a left side view of a mower.

FIG. 2 is a plan view of the mower.

FIG. 3 is a rear view of the mower.

FIG. 4 is a left side perspective view of the mower.

FIG. 5 is a perspective plan view of the mower.

FIG. 6 is a plan view of an operation panel portion of the mower.

7A and 7B are a side view and a front view of a mower shaft portion.

FIG. 8 is a left side perspective view of the mowing machine showing a state where the mowing device is raised.

FIG. 9 is a left side perspective view of the mowing device portion.

FIG. 10 is a perspective plan view of a mowing device portion.

FIG. 11 is a plan view of the mower with the reaper slid to the left.

FIG. 12 is a plan view of the mower with the reaping device slid to the right.

FIG. 13 is a rear view of the frame showing a supporting state of the steering frame.

FIG. 14 is a plan view of a frame showing a supporting state of a steering frame.

FIG. 15 is a rear view of the control frame with the control section tilted.

FIG. 16 is a rear view of the mower showing a working state on a sloping ground.

FIG. 17 is a left side sectional view of an operation lever portion.

18 (a) and 18 (b) are a side view and a rear perspective view of the operating lever showing a supported state of the operating lever.

FIG. 19 is a left side main part sectional view showing a connected state of the operating lever and the traveling hydraulic pump.

FIG. 20 is a cross-sectional view of a main part of a plane showing a connected state of the operating lever and the traveling hydraulic pump.

21 (a) and 21 (b) are a side view and a rear perspective view of the operation lever showing a supported state of the operation lever in a state where the machine body is pivotally turned leftward.

22 (a) and 22 (b) are a side view and a rear perspective view of the operation lever showing a supported state of the operation lever in a state where the machine body is super-swirled to the left.

FIG. 23 is a plan view of a lever guide.

FIG. 24 is a plan view of relevant parts of an engine and an oil cooling portion.

FIG. 25 is a left side view of essential parts of an engine and an oil cooling portion.

FIG. 26 is a rear sectional view showing an engine and a cooling portion of oil.

FIG. 27 is a rear view of the essential parts of the engine and oil cooling portion.

FIG. 28 is a rear view of the essential parts of the engine and oil cooling portion with the air filter pulled out.

FIG. 29 is a hydraulic circuit of the mower.

[Explanation of symbols]

1 traveling device 2 aircraft 3 reaper 9 engine 11 counter gear case 13 Output extractor 16 traveling hydraulic pump 14 Mowing hydraulic pump 161 radiator 164 Air Filter 167 Air Filter 186 oil cooler 190 hydraulic pipe

Claims (5)

[Claims] 1. A traveling hydraulic continuously variable transmission which drives a traveling device (1) by providing a mowing device (3) for mowing in front of or behind a vehicle body (2) supported by the left and right traveling devices (1). And a mowing hydraulic continuously variable transmission that drives the mowing device (3), and in the mowing machine in which both hydraulic continuously variable transmissions are driven by the engine (9), the engine (9) is a machine body (2).
The counter gear case (11) is arranged vertically in the center, and the counter gear case (11) is arranged in front of the engine (9). 1
A mowing machine in which a traveling hydraulic pump (16) forming a traveling hydraulic continuously variable transmission is arranged on one side of the left and right of 1) and a cutting hydraulic pump (14) constituting a cutting hydraulic continuously variable transmission is arranged on the other side. 2. A radiator (161) is arranged in a space behind the engine (9), and an air introduction portion for the radiator (161) is provided behind the radiator (161), and the introduction portion is directed rearward. The mower according to claim 1, wherein the mower is opened. 3. A plurality of air filters (164), (167) are provided on the introduction side in front and back, and the air filters (16)
4. The mower according to claim 2, wherein 4) and (167) are attached so that they can be pulled out in the left-right direction. 4. An oil cooler (186) for cooling at least oil for both hydraulic continuously variable transmissions is arranged in the introduction part, and the radiator (1) cools the oil cooler (186).
The mower according to claim 2 or 3, which is carried out by air to 61). 5. An oil cooler (186) is provided on the introduction side,
The oil cooler (18
5. The mower according to claim 4, wherein the pipe of the hydraulic pipe (190) to 6) is detachable above the oil cooler (186).